I would make a couple of large water changes and check your water prams before you add the Betta....I wouldn't do a 100% unless needed....You can remove all the water-but don't clean the walls or over vacuum since you will already have some good bacteria starting to colonize....

What is your final stocking plan, type of filter, any live plants...generally for fishless cycle for a fully stocked 10gal tank...ammonia 3-5ppm-maintain that until you start to see nitrate...Do you have a thread made.....

Yeah, really. We have some of the nicest people I've ever spoken to on this site, and she couldn't get over herself enough to just be civil. I felt kind of rude, especially when I said that she shouldn't have a fish, but that's what she needed to hear.